Recent content by eudoxos

No experience here, did not try OpenCL. I am still in the progress of compiling the http://woodem.org code for XeonPhi, to run it directly there, but not much time lately. I want to try keeping the same code as for CPU, perhaps with just a few optimizations. It needs a bunch of c++ libs, so the...

I meant it has 60 physical cores, AFAIK, each with 4 hyper-threads ones, showing up as 240 "virtual" cores.

OpenCL and XeonPhi are not directly comparable, it is like comparing GPUs with CPUs; GPUs are very good at something at suck really bad for other things. XeonPhi is 240 virtual PentiumIII (IIRC) cores plus extra vector math instructions. Lot of work to compile things (you need intel compiler...

I just want to report that Xeon Phi works well with P9X79-E WS. A friend of mine converted the PC to a water-cooled one with 4 radiators inside the case, and it is almost silent. The cooling was not cheap, though.

Of course I use Linux... For PCIe, I don't, I don't care so much, the card will be used for running the entire program (loaded over NFS), not for offloading routines from programs running on the CPU otherwise. The card is working just fine, judging by all diagnostics tools (micctrl etc) though...

That's because most SC solve matrices (linpack) for huge PDEs discretized over an insane amount of elements. But I need to solve my problems, not those I don't have....

@wirk raw FPS are meaningless as most the time is spent (and that is true also for CPUs) waiting for data from RAM for usual tasks; and that is not a design problem of the code, it is how it is. The GPUs we had were FirePro and some high-end from nVidia and we could not even match the...

No. And believe me, I am good programmer, spent 5 months full-time on trying that plus consulted expensive GPGPU pros. GPGPU is hype, it is usefl only for very specific tasks (with predictable memory access patterns) -- most discretized continuum simulations (finite elements, finite volumes)...

I confirm that the 7120p works with the ASUS P9X79-E WS (which officially supports only Xeon Phi 3120 and friends). Now the cooling, that will be a bit of a hassle. Someone owning the 7120A would care to photograph how it is arranged internally? Where is the fan connected? I could perhaps use...

If I buy the older P9X79-E WS, I don't have to upgrade the CPU (i7-3930K, a 32nm model) and RAM (DDR3 1600MHz). I assume those would not work with the X99? Replacing just the mobo is the cheapest solution. If I decide to upgrade the whole thing, then, yes, X99-E WS is hot candidate (unless I go...

Good point for comparison, it is true I have 2x80mm fans on the CPU. and it has a massive cooler. The card has 3-pin fan socket, when I connect it there, will it regulate the fan depending on temperature itself? Or do I need to do that from software?

Particule sims, that's why I need it. Those suck at GPU (unpredictable memory accesses) but parallelize very well on CPUs.

I bought a Xeon Phi 7120p and need to upgrade the mobo from ASUS P9X79 PRO which does not support Xeon Phi (precisely, it does not feature "memory mapped I/O address ranges above 4GB" (there is a writeup about that here). I am a bit torn between two possibilities. Easier one is to just replace...